Pipe-cutter.



Patented Aug. 20, MM. A KATZKI PIPE CUTTER.

(Application filed June 5, 1900.)

(No Model.)

mm hn n WITNESSES intrnn Frames ALBERT KATZKI, OF ERIE, PENNSYLVANIA.

PIPE CUTTER.

SPECIFICATION forming part of Letters Patent N 0. 680,866, dated August20, 1901. Application filed June 5, 1900. Serial No- 19,157. (No model)T0 at whom it may concern:

Be it known that I, ALBERT KATZKI, a citizen of Germany, residing atErie, in the county of Erie and State of Pennsylvania, have inventedcertain new and useful Improvements in Pipe-Cutters; and I do herebydeclare the following to be a full, clear, and exact description of theinvention, such as will enable others skilled in the art to which itappertains to make and use the same.

This invention relates to pipe-cutters 5 and it consistsin certainimprovements in the construction thereof, as will be hereinafter fullydescribed, and pointed out in the claims.

The object of the invention is to provide a pipe-cutter in which thecutter-head may be more rapidly moved to the work than in pipecuttersheretofore made and in which pressure may be applied to the cutter afterbeing brought to the work.

The invention is illustrated in the accompanying drawings, as follows: 7Figure 1 shows a section on the line 1 1 in Fig. 2. Fig. 2 shows a frontelevation of the device. Fig. 3 shows a section on the line 3 3 in Figs.1 and 2. Fig. 4 shows a section on the line 4 4: in Figs. 1 and 2.

A marks the stationary head, in which is arranged the rotary cutters aa. Extending from the stationary head is the guide A, which comprisestwo side pieces, between which the guide extension B of the movable cutter-head B slides. The guide extension B is provided with the flanges19 which pass by the guides A and lock the extension-guide B in place.The extension-guide B is secured to the movable head B by the pins 19. Acutting-wheel b is journaled in the movable head and positioned to bebrought in proper relation with the wheels at a when the movable head Bis pressed forward to its work. Secured to the guide A and arrangedopposite the stationary head A is the screw-head A Passing through thisscrew-head is a guide-opening in which slides a nut C. The nut C isprovided on its front surface with the ratchet-teeth c. The pawl D ispivoted in the screw-head A by means of a pivot-pin a and is pressedinto engagement with the teeth 0 by means of the spring a. The teeth aare so beveled that the nut 0 may be moved forward by the pawl D, but isprevented from a return movement while the pawl D is in position. Thepawl D is provided with the thumbpiece d, by which it may be pressed outof the position in which it engages the teeth 0. WVhen in this position,the nut C may be readily drawn back, if desired.

A semicircular slot 0 is cut in the back side of the nut O, and acircular key a is screwed into the head A This key ct has the notch a init of sufficient depth to clear the nut 0 when the notch is broughttoward the front of the cutter. With the key a in this position the nutmay be moved to its work by a sliding movement and the cutting actionproduced by means of the screw operating in the nut. If for any reasonit is not desired to use the ratchet or quick-action mechanism, the keyct may be turned in the head A bringing the circular part of the keyinto the notch c of the nut O. This looks the nut against movement inthe head, and the cutter may be used as ordinary cutters are used.

A screw E is arranged to operate in the nut C. This screw has an annulargroove 6 at its end, and the end is placed in the socket b in thesliding head B. A set-screw b is screwed into the sliding head B andinto the annular notch (2, so as to lock the screw E with the slidinghead D. A stem E extends from the screw E, and this is provided with theusual turning-handle E.

In the ordinary operation of the device the screw is placed on the pipeand the cutter moved up to its work by sliding the nut 0 through thescrew-head A When the cutter has reached its work, it is pressed forwardby means of the screw, as with the ordinary cutters. After the cut iscomplete the pall D is moved out of engagement with the ratchetteeth c,and the nut C and the sliding head may be withdrawn from the work.

WVhat I claim as new is-- 1. In a pipe-cutter, the combination of afixed cutter-head; a movable cutter-head arranged to move in relation tosaid cutter-head; a screw-head rigidly connected to said cutterheadarranged opposite said fixed head and having a guide-opening therein; asliding nut in said guide -opening of the screw-head; means for lockingsaid nut in position; and a screw operating in said nut upon saidsliding head.

2 In a pipe-cutter, the combination of a fixed cutter-head 5 a movablecutter-head arranged to move in relation to said cutter-head; ascrew-head rigidly connected to said cutterhead arranged opposite saidfixed head and having a guide-opening therein; a sliding nut in saidguide-opening of the screw-head; a ratchet mechanism arranged to allowforward movement of said nut for locking said nut against areturnmovement; and a screw operating in said nut upon said sliding head.

3. In a pipe-cutter, the combination of a. fixed cutter-head; a movablecutter-head arranged to move in relation tosaid cutter-head; 1 ascrew-headrigidly connected to said cutterhead arranged opposite saidfixed head and having a guide-opening therein; a sliding nut arranged insaid guide-opening of the screwhead; a ratchet mechanism arranged toallow forward movement of said nut and for locking said nut against areturn movement; a key mechanism arranged to be brought in the path ofthe sliding nut to lock said nut per manently in position or to be movedout of; the path of said nut to allow a sliding movement of said nut;and a screw in said nut arranged to operate upon said movable head.

4. In a pipe-cutter, the combination with the head, A, having the guide,A, thereon; a movable head, B, arranged to move the guide, A; ascrew-head, A secured to the guide, A a sliding nut, 0, arranged in thehead, A having the ratchet-teeth, c, thereon; the pawl, D, pivoted inthe head, A; and the screw, E, operating in said nut upon said movablehead, B.

5. In a pipe-cutter, the combination with the head, A, having the guide,A, thereon; a movable head, 13, arranged to move on the guide, A; ascrew-head, A rigidly secured to the guide, A and having a guide-openingtherein; a sliding nut, C, arranged in said guide-opening of the head, Aand having the ratchet-teeth, c,thereon the pawl, D, piv= oted in thehead, A the screw, E, operating in said nut upon said movable head, B;and the key, 0/, having the notch, a ,therein arranged to operate uponthe nut, O, as do scribed.

In testimony whereof I affix my signature in presence of two witnesses.

ALBERT KATZKI.

Witnessesi JOHN S. BILLING,

-H.'G. LORD.

